bio monohybrid/dihybrid crosses and pedigree charts

dominant

A trait that is expressed even when only one copy of the corresponding allele is present in an individual.

recessive

A trait that is expressed only when two copies of the corresponding allele are present in an individual.

genotype

The genetic makeup of an individual, specifically the alleles for a given trait.

phenotype

The observable physical characteristics of an individual resulting from the alleles.

homozygous

When an individual has two identical alleles for a particular trait, either dominant or recessive.

heterozygous

When an individual has two different alleles for a particular trait, one dominant and one recessive.

autosomal inheritance

shows what trait will be passed down, one allele from each parent

autosumal dominant

An inheritance pattern where a dominant allele from one parent can express the trait in the offspring, even if the other allele is recessive.

autosomal recessive

An inheritance pattern where a trait is expressed when both alleles are recessive.